Davy

I'm looking for the name of a drug movie I saw about 5 years ago. It's about some ambulance rental drug addicts who have a chinese boss. At some point in the movie they blow up a back yard drug lab on accident. It's really wacked with a lot of drug abuse. I believe it was made in the 90's sometime. Can anybody help me out? Oh, it's not "Bringing out the dead" by the way.